Refillgble electric ettse



l w. F. MULLER. REFILLABLE ELECTRIC FUSE.

' APPLICATION FILED DEC. I8, 1918. 1,317,381.

PateutedSept. 30,'1919.

'fgilivA\\\\\\\\\\\\\\\\\\\\ WILLIAM F. MULLER, OIF BRUILLYN, .lil'lflilf YORK.

. REFILLABLE ELECTRIC EUS E.'

and exact description.

This invention relates to improvements in fuses, the chief object being to provide an' inexpensive refllable fuse or a fuse that can be' rendered again usable after it has been l'blown out. I employ 4the term fuse to indicate a suitable casing or container having a generally employed in the 'My invention has for an object to provide fusible element withinsame, such term being such a container or casing arranged for the insertion of a fusible element after'tlie fuse has blown, thereby usableas many times as desirable.l

I will now proceed to describe in what manner I carry out my invention, reference being had to the accompanying drawing, for an. illustration yof an embodiment of my in vention, wherein Figure l illustrates a sectional view of my invention embodied-in the form of a pluglfuse; i

F ig. 2 is a top plan view thereof on a reu duced scale;

Fig. 3 is a fragmentary sectional view of modi'ed form of my invention; an lV Figl i is a longitudinal sectional view of'a cartridge fuse embodying my improvementu To embody my improvement in the form ofaplug-fuse, I employ a chambered casing.

or container 5 carrying a threaded sleeve 6' of conducting material, yto engage the threads of a' socket, the casing being formed out 5f non-conducting material.l In this instance one end of the casing is enlarged as at 7 and provided with threads 8, on the periphery thereof, to engage the threads of a removable cap 9. One end of the Casin carries a screw contact 10 around which one end of a fuselwire 11 is wound. The other end of the fuse-'wire is wound around a movable plate 13 Anhieb is maintai threaded binding-post 1Q carried by areof conducting material, ed in contact with pins lll (in this instan which extend through the casing 5 and engage the shell 6; hence the Lircuit in which the fuse is placed will include"l contact 10, fuse 11. nlate 12, pins 14 Specification of Letters Patent.

electrical trade.

rendering the casingA Patented hepts 3th, ldt),

Application lcd December 18, 1918. Serial No. 26?',235

and shell 6. rlhe plate 13 is maintained in contact with the pins llby a spring l5 bearing at one end thereof against the cap 9 which, in this form of my invention, is made out of non-conducting material. Instead of employing a cap such as 9, and a spring, I may provide metal cap, such as is indicated by lb, 3, carrying a post 17 provided with a tip i8 of insulating material (rubber for instance), vthe resiliency of which will maintain plate 13 in contact with pins lll. is will be seen, the tip 18 lwill be recessed as at l to "eceive the head of the binding-post l2. Should the fuse ll blow ont, it will simply be necessary to remove cap 9, tal-re ont ythe plate 13, and remove the fragments of the blown fuse, and insert a new fuse (such a fuse being a part of a coil. of fusible wire in which form this type of fuse usually provided). @ne end will be passed through opening 20 in one end 'of the casing The wn will now be drawn through chanxbers 2l and 22 and the end thcrecfpassed through opening 23 in the new removed plate 13, which it will be wound "onnd the now loosened bindif) i ch will be screwed down c tno e been wound thcrearound. After li ving performed the above mentioned operation, the plate '13 can-be drawn into chamber 5.33.2, and against pins-14, by pulling 'the wire from the. end or nose 24: of the plug. lifter. the plate has been 'thus drawn into place, the wire will be wound around contact l@ and cnt oli, whereupon the contact may be screwed down. After spring i5 has been placed in position within chamber 22, cap@ can be placed in position and screwed home. The will now maintain plate i3 in contact withpins lll.

To embody my invention in the form of a' cartridge-fuse, ber or tube of non-condncting material sce lig. 4), having sleeves and 27 at opposite ends thereof. vOne end of the tube 25 carries a fixed plate 28 of conducting material, which is electrically' connected to its adjacent sleeve if?. The opposite end of the tube 25 carries a renovable plate 29 of conducting material.l held in contact 'with pins 30 connected to sleeve Q6 by a plug 3l of insulatine' material threaded into the endv of the tribe 25. The 32 is secured tollxed plate 23 by a binding-screw 33, and to the plate 29 by a binding-screw 34. Each plate l l' employ an elongated chaml ica 30th. 'forms prommutely ale Wi l be prawn lent @u th@ @X33 y rt @ne end the J concmcug del... utbuchmcn; v a fum- -ove-rbff, Support ufl arranged 1b;

dus@ the @m1 invention, Whsr corrucng element return sind ulterior and yilkrblu mears to fondrzcor in pobtio A fuse conssbng of arckrauubered um ging, open at on@ and thereof th an opening in the closed. and thereof the pass; ge of a 'inse wire, u, Cammy ace-nt said opening for the :xttm-hnrent and. provided Src other und @fr und :n mmf-,mv

@numbered @M+ u conducting el@ f 'me mroo', a con.-

rivali y ,a d shell @im movable plate within the "to secure. the other und of said ruse wir@ o said plate, n cap of no rial for the open and of mid 'ulg interposed between sa.

@bamberg mums L. L fuse wnSStr open r one euri thm with un opening in the du, for he passage of' u fuse, wir?) jacent Suid openngg Jfor herrero @if one and mi du.; nbge plate within ijn;

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